Synaptic is a graphical package management program for Debian based Linux distributions. It provides the same features as the apt-get command line utility with a GUI front-end based on Gtk+. The Synaptic package manager enables the user to install, to upgrade or to remove software packages. To install a package a user must search for the package they want and mark it for installation. Changes are not applied instantly; the user must first mark all changes and then apply them.

There are times where you don not want a particular package from getting upgraded, follow the steps below to prevent any package in your Ubuntu system from getting upgraded using Synaptic package manager with few clicks.

First, open the Synaptic package manager from: System > Administration and reload the repository by clicking on "reload" button then type/search the name of package that you wanted to prevent it from getting upgraded.

Next, select the package and click on Package (from menu) and click on "Lock Version" to lock the package.